Ner River Valley (971)
Poland, Europe
Site overview
KBA status: confirmed
Year of last assessment: 2010
National site name: Dolina Neru
Central coordinates: Latitude: 52.0667, Longitude: 19.0667
System: freshwater, terrestrial
Elevation (m): 90 to 100
Area of KBA (km2): 71.70904
Protected area coverage (%): 100.00
KBA classification: Global/Regional TBD
Legacy site: Yes
Site details
Site description: The Ner valley is a marshy stretch of the Warszawa-Berlin valley between the towns of £êczyca and D¹bie, and adjoins the Bzura river valley. Wet meadows dominate the area, but on low-lying land and adjacent to water there are reedbeds Phragmites in some places, as well as riverine forest and scrub, on the more elevated, drier ground, dry broadleaved forest. The easternmost part of the valley (around £êczyca and B³onia towns) was drained in 1980, and is now less attractive to waterbirds. Other parts of the valley flood annually. The most interesting area ornithologically is around D¹bie town.
Rationale for qualifying as KBA: This site qualifies as a Key Biodiversity Area of international significance because it meets one or more previously established criteria and thresholds for identifying sites of biodiversity importance (including Important Bird and Biodiversity Areas, Alliance for Zero Extinction sites, and Key Biodiversity Areas)
Additional biodiversity: The most attractive area in central Poland for staging geese and ducks during spring migration. Breeding species of global conservation concern that do not meet IBA criteria: Acrocephalus paludicola (2-3 pairs).
Habitats
Land use: agriculture (90%) | forestry (5%) | hunting | not utilised (5%)
| IUCN Habitat | Coverage % | Habitat detail |
|---|---|---|
| Forest | 4 | |
| Grassland | 48 | |
| Artificial - Terrestrial | 5 | |
| Wetlands(Inland) | 43 |
Threats
Summary of threats to biodiversity at KBA: Threats include hunting and the collection of eggs of Anser anser.
| Threat level 1 | Threat level 2 | Threat level 3 | Timing |
|---|---|---|---|
| Agriculture & aquaculture | Annual & perennial non-timber crops | Small-holder farming | Ongoing |
| Natural system modifications | Fire & fire suppression | Increase in fire frequency/intensity | Ongoing |
| Natural system modifications | Dams & water management/use | Dams (size unknown) | Only in the future |
| Energy production & mining | Renewable energy | Only in the future | |
| Transportation & service corridors | Roads & railroads | Only in the future | |
| Human intrusions & disturbance | Recreational activities | Ongoing | |
| Pollution | Garbage & solid waste | Ongoing |